cnpm install -D @vuepress/plugin-active-header-links
cnpm install -D @vuepress/plugin-last-updated
cnpm install -D @vuepress/plugin-back-to-top
cnpm install -D @vuepress/plugin-medium-zoom
cnpm install -D @vuepress/plugin-nprogress
cnpm install -D @vuepress/plugin-search
cnpm install -D @vuepress/shared-utils
cnpm install -D @vuepress/plugin-pwa
cnpm install -D @vuepress/theme-vue
cnpm install -D lint-md-cli
cnpm install -D vuepress
cnpm install -D vuepress-plugin-sitemap
cnpm install -D vuepress-plugin-img-lazy
cnpm install -D vuepress-plugin-code-copy

or 

yarn add -D @vuepress/plugin-active-header-links
yarn add -D @vuepress/plugin-last-updated
yarn add -D @vuepress/plugin-back-to-top
yarn add -D @vuepress/plugin-medium-zoom
yarn add -D @vuepress/plugin-nprogress
yarn add -D @vuepress/plugin-search
yarn add -D @vuepress/shared-utils
yarn add -D @vuepress/plugin-pwa
yarn add -D @vuepress/theme-vue
yarn add -D lint-md-cli
yarn add -D vuepress
yarn add -D vuepress-plugin-sitemap
yarn add -D vuepress-plugin-img-lazy
yarn add -D vuepress-plugin-code-copy
